Journal
PHYSICAL REVIEW B
Volume 61, Issue 15, Pages 9883-9886Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.61.9883
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Using ultrafast time-resolved ultraviolet photoelectron spectroscopy, we have followed the energy relaxation kinetics of conduction electrons in quartz, for energies of the order of 30 eV above the conduction-band minimum. We measure energy-loss rates three orders of magnitude lower than those estimated for energies close to this minimum. Likewise, the impact ionization rate obtained (1/40 ps(-1)) is much lower than the values generally assumed in optical breakdown models.
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